CN115923683B - Automobile rear bottom guard board capable of reducing wind resistance coefficient and automobile - Google Patents
Automobile rear bottom guard board capable of reducing wind resistance coefficient and automobile Download PDFInfo
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- CN115923683B CN115923683B CN202310082591.0A CN202310082591A CN115923683B CN 115923683 B CN115923683 B CN 115923683B CN 202310082591 A CN202310082591 A CN 202310082591A CN 115923683 B CN115923683 B CN 115923683B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 7
- 239000003351 stiffener Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
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- 230000001681 protective effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/82—Elements for improving aerodynamics
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Abstract
The application provides an automobile rear bottom guard board capable of reducing wind resistance coefficient and an automobile, wherein the automobile rear bottom guard board capable of reducing wind resistance coefficient comprises a guard board body; the backplate body includes: the protection area is used for covering the rear bottom area of the automobile; a cover plane is arranged on one side of the protection area, which is far away from the automobile rear bottom area; the rear bottom area of the automobile is positioned at the bottom of the whole automobile and is an area surrounded by a rear bumper, a rear auxiliary frame and a pair of rear wheel covers; the connecting area is arranged around the protection area and comprises front-end connecting parts and rear-end connecting parts distributed along the first direction; the front end connecting part is used for being connected with the rear auxiliary frame; the rear end connecting part is used for being connected with a rear bumper; when the backplate body is installed in the automobile rear bottom area, one end of the cover plane, which is close to the rear end connecting part, is higher than one end of the cover plane, which is close to the front end connecting part, and the height difference of the cover plane and the front end connecting part in the vertical direction is smaller than or equal to a first preset threshold value. The application gives consideration to the aesthetic property of the bottom of the whole vehicle and the wind resistance of the whole vehicle.
Description
Technical Field
The application relates to the technical field of automobile manufacturing, in particular to an automobile rear bottom guard board capable of reducing wind resistance coefficient and an automobile.
Background
With the continuous progress of technology, consumers have higher requirements on automobile performance, and wind resistance performance is one of automobile performance focused by consumers. The rear bottom guard board is used as an important part of the bottom of the whole car, and has important influence on the wind resistance and the appearance of the whole car.
In the traditional automobile structural design, particularly in the pure electric vehicle type design, in order to ensure the aesthetic property of the bottom of the whole automobile, a rear bottom guard plate is arranged at the bottom of the rear part of the automobile chassis, the rear bottom guard plate coats the rear bottom of the automobile chassis, the front span and the rear span of a coating area are from a lower guard plate support to a rear bumper of the rear part of the automobile chassis, and the coated front span and the coated rear span are relatively large, so that the effect of attractive appearance is achieved; however, the cladding effect of the bottom guard plate is not beneficial to heat dissipation at the bottom of the automobile, and meanwhile, the wind resistance coefficient of the whole automobile can be increased; in order to reduce the wind resistance coefficient of the whole vehicle, in some vehicle structural designs, such as the designs of fuel oil and range-extending vehicle types, a rear bottom guard plate is omitted, namely the rear bottom of a chassis of the vehicle is completely exposed, so that the heat dissipation requirement is met, and the wind resistance coefficient of the whole vehicle is greatly reduced. The existing automobile structural design cannot give consideration to the aesthetic property of the bottom of the whole automobile and the wind resistance of the whole automobile. Therefore, the application provides the automobile rear bottom guard board and the automobile, which can reduce the wind resistance coefficient.
Disclosure of Invention
The application aims to solve the problems and provide an automobile rear bottom guard board and an automobile capable of reducing the wind resistance coefficient.
In a first aspect, the present application provides an automobile rear bottom guard board capable of reducing a wind resistance coefficient, comprising a guard board body; the backplate body includes:
The protection area is used for covering the automobile rear bottom area; a cover plane is arranged on one side of the protection area, which is far away from the automobile rear bottom area; the automobile rear bottom area is positioned at the bottom of the whole automobile and is an area surrounded by a rear bumper, a rear auxiliary frame and a pair of rear wheel covers;
The connecting area is arranged around the protection area and comprises front-end connecting parts and rear-end connecting parts distributed along a first direction; the front end connecting part is used for being connected with the rear auxiliary frame; the rear end connecting part is used for being connected with the rear bumper;
When the guard plate body is installed in the automobile rear bottom area, the cover plane is close to one end of the rear end connecting portion and higher than one end of the cover plane, which is close to the front end connecting portion, and the height difference of the cover plane and the front end connecting portion in the vertical direction is smaller than or equal to a first preset threshold value.
According to some embodiments of the present application, the value range of the first preset threshold is 60-80 mm.
According to some embodiments of the application, the front end connection portion includes:
A straight connecting section extending in a second direction; the second direction is perpendicular to the first direction; a plurality of first connecting holes are distributed on the straight connecting part along the second direction; the first connecting hole is used for being connected with the rear auxiliary frame;
The two avoidance connection parts are respectively arranged at two ends of the straight connection part; the end face of the avoidance connection subsection, which is far away from the protection area, is a concave curved surface which is bent towards the side close to the protection area; the concave curved surface encloses and is used for dodging the space of dodging of rear wheel cover.
According to the technical scheme provided by some embodiments of the present application, an arc overlap edge connected with the concave curved surface is arranged at one side of the avoidance space away from the coverage plane; a plurality of second connecting holes are formed in the lap joint edge; the second connecting hole is used for being connected with the rear wheel cover.
According to some embodiments of the present application, the end surface of the flat connection part far from the protection area is recessed toward the side near the protection area to form a deformation-preventing space.
According to some embodiments of the present application, the end surface of the rear end connecting portion away from the protection area is a curved structure curved toward the side away from the protection area; the rear end connecting part is provided with a plurality of third connecting holes; the third connecting hole is used for being connected with the rear bumper.
According to some embodiments of the present application, the connection area further includes two intermediate connection portions distributed along the second direction; the two middle connecting parts are respectively connected between the front end connecting part and the rear end connecting part; a first included angle is formed between the extending directions of the two middle connecting parts, which are far away from the end face of one side of the protection area; the opening direction of the first included angle is oriented along the direction that the rear end connecting part points to the front end connecting part.
According to some embodiments of the present application, the covering plane is provided with a plurality of first reinforcing ribs distributed at intervals along the second direction; the first reinforcing rib extends along the first direction; and the first reinforcing rib is provided with a first water leakage hole.
According to some embodiments of the present application, the first reinforcing rib includes a stationary portion and a gradual change portion disposed at a side of the stationary portion near the rear end connection portion; the cross section of the stable part is rectangular; the cross section shape of the gradual change part is isosceles trapezoid, and one end connected with the stable part is the big end of the gradual change part.
According to the technical scheme provided by some embodiments of the present application, a second reinforcing rib is connected between two adjacent first reinforcing ribs; the second reinforcing ribs extend in the second direction.
According to the technical scheme provided by certain embodiments of the application, the guard plate body is also provided with a second water leakage hole; the second water leakage hole corresponds to a water outlet of the vehicle-mounted air conditioner.
In a second aspect, the present application provides a vehicle, including the automotive rear floor panel capable of reducing the wind resistance coefficient.
Compared with the prior art, the application has the beneficial effects that: according to the automobile rear bottom guard board capable of reducing the wind resistance coefficient, the front end connecting part connected with the rear auxiliary frame of the whole automobile and the rear end connecting part connected with the rear bumper of the whole automobile are arranged, the height difference of the front end and the rear end in the vertical direction is not larger than the first preset threshold value when the automobile is installed, and in the normal running process of the automobile, on one hand, the upward movement of air flow to the tail of the automobile can be prevented to a certain extent, so that the distance between the vortex rotation center of the tail part and the tail is increased, the backward resistance is reduced, and the wind resistance coefficient of the whole automobile is reduced; on the other hand, the rear bottom guard board covers the rear of the whole vehicle bottom, and the aesthetic effect of the whole vehicle bottom is not greatly influenced from the view of the vehicle tail. In conclusion, the automobile rear bottom guard board capable of reducing the wind resistance coefficient provided by the application has the advantages of attractive appearance of the bottom of the whole automobile and wind resistance performance of the whole automobile.
Drawings
FIG. 1 is a schematic diagram of a back end shield for an automobile capable of reducing the wind resistance coefficient according to embodiment 1 of the present application;
Fig. 2 is a schematic view of a section y=0 after installation of the automobile rear bottom guard plate capable of reducing the windage coefficient and the conventional automobile rear bottom guard plate according to embodiment 1 of the present application;
FIG. 3 is a schematic diagram of an installation structure of a rear bottom guard board of an automobile capable of reducing a wind resistance coefficient according to embodiment 1 of the present application;
Fig. 4 is a schematic structural diagram of a connection between a rear bottom guard board and a rear subframe of an automobile, which is provided in embodiment 1 of the present application and can reduce the wind resistance coefficient.
The text labels in the figures are expressed as:
1. A protection zone; 11. a first reinforcing rib; 111. a stationary portion; 112. a gradual change part; 12. a first water leakage hole; 13. a second reinforcing rib; 14. a second water leakage hole;
2. A connection region; 21. a front end connection part; 211. a straight connection section; 212. a first connection hole; 213. avoidance connection branches; 214. an avoidance space; 215. overlapping edges; 216. a second connection hole; 217. an anti-deformation space; 22. a rear end connection portion; 221. a third connection hole; 23. an intermediate connection portion; 31. a rear bumper; 32. a rear subframe; 33. a rear wheel cover; 34. and a connecting frame.
Detailed Description
In order that those skilled in the art may better understand the technical solutions of the present application, the following detailed description of the present application with reference to the accompanying drawings is provided for exemplary and explanatory purposes only and should not be construed as limiting the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Example 1
Referring to fig. 1, the present embodiment provides an automobile rear bottom guard board capable of reducing wind resistance coefficient, including a guard board body; the backplate body includes:
The protection area 1 is used for covering the rear bottom area of the automobile; a cover plane is arranged on one side of the protection area 1 away from the automobile rear bottom area; the rear bottom area of the automobile is located at the bottom of the whole automobile and is an area surrounded by a rear bumper 31, a rear subframe 32 and a pair of rear wheel covers 33;
the connecting area 2 is arranged around the protective area 1 and comprises front end connecting parts 21 and rear end connecting parts 22 distributed along the first direction; the front end connecting part 21 is used for being connected with the rear auxiliary frame 32; the rear end connection portion 22 is for connection with the rear bumper 31;
When the guard plate body is mounted in the rear bottom area of the automobile, the cover plane is close to one end of the rear end connecting portion 22 and is higher than one end of the cover plane, which is close to the front end connecting portion 21, and the height difference of the cover plane and the front end connecting portion in the vertical direction is smaller than or equal to a first preset threshold value.
Specifically, the guard plate body includes a guard zone 1 and a connection zone 2 around the guard zone 1, and the guard zone 1 and the connection zone 2 are integrally formed, and are divided into different areas for the sake of clarity.
The protection area 1 is a central area of a rear bottom guard plate, is approximately of a rectangular structure, and is used for covering a rear bottom area of an automobile, wherein the rear bottom area of the automobile is a self-defined area and is positioned behind the bottom of the whole automobile; the whole vehicle mentioned here is a conventional whole vehicle structure of the prior art center, which has a conventional assembly structure; the automobile rear bottom area is an area formed by surrounding a rear auxiliary frame 32 in a chassis assembly, a rear bumper 31 in a decoration assembly and two rear wheel covers 33 together; the protective area 1 has opposite front and rear faces, the face of which facing the rear floor area of the motor vehicle is denoted as rear face and the face facing away from the rear floor area of the motor vehicle is denoted as front face, the cover plane being the front face of the protective area 1.
The connecting area 2 is a circle of area which is annularly arranged at the edge of the protection area 1; for convenience of description, the vertical direction in fig. 1 is defined as a first direction; the front end connecting portions 21 and the rear end connecting portions 22 are distributed along the first direction, the front end connecting portions 21 are regions below in fig. 1, the rear end connecting portions 22 are regions above in fig. 1, during installation, the rear end connecting portions 22 are connected with rear bumpers 31 at the tail of the bottom of the whole vehicle, and the front end connecting portions 21 are used for being connected with rear auxiliary frames 32 at the bottom of the whole vehicle.
Referring to fig. 2, in a conventional whole vehicle coordinate system in the prior art, an X direction refers to a longitudinal direction of a vehicle, a Y direction refers to a transverse direction of the vehicle, and a Z direction refers to a height direction, wherein the X direction and the Y direction are both horizontal directions, and the Z direction is a vertical direction; FIG. 2 is a schematic view of a cross section Y=0 of the back end shield for an automobile and a conventional back end shield for an automobile according to the present application capable of reducing the wind resistance coefficient; in fig. 2, n 1 is a line of a section y=0 of the guard plate body of the rear bottom guard plate of the automobile provided by the application; when the guard plate body is mounted on the rear bottom area of the automobile, the guard plate body is in an inclined state, the inclined reference plane is a horizontal plane n 0, the point a in fig. 2 is the end point position of the cover plane relatively close to the rear end connecting portion 22 on the section y=0, the point B is the end point position of the cover plane relatively close to the front end connecting portion 21 on the section y=0, the heights of the cover plane and the cover plane in the vertical direction (i.e. the Z direction) are inconsistent, the height of the point a is higher than the height of the point B, the height difference h of the point a is smaller than or equal to a first preset threshold value, alternatively, the value range of the first preset threshold value may be 60-80 mm, in this embodiment, the height difference between the cover plane and the horizontal plane n 0 forms an included angle θ of 6.9 °.
In fig. 2, n 2 is a line of a section y=0 of a conventional automobile rear bottom guard plate after being mounted at the bottom of the whole automobile, the length of the conventional automobile rear bottom guard plate in the X direction is longer than that of the rear bottom guard plate of the application, the height difference of two end points of the conventional automobile rear bottom guard plate in the X direction in the y=0 section is at least 40mm greater than that of the application, the greater the height difference between the front end and the rear end of the automobile rear bottom guard plate is, the smaller the distance between the front end point of the rear bottom guard plate and the ground is, the greater the wind resistance coefficient of the whole automobile is, the air current more easily flows upwards to the tail of the automobile along the front end of the rear bottom guard plate in the normal running process of the automobile, the resistance is increased, and the wind resistance coefficient of the whole automobile is increased.
According to the automobile rear bottom guard board capable of reducing the wind resistance coefficient, the front end connecting part connected with the rear auxiliary frame of the whole automobile and the rear end connecting part connected with the rear bumper of the whole automobile are arranged, the height difference of the front end and the rear end in the vertical direction is not larger than the first preset threshold value when the automobile is installed, and in the normal running process of the automobile, on one hand, the upward movement of air flow to the tail of the automobile can be prevented to a certain extent, so that the distance between the vortex rotation center of the tail part and the tail is increased, the backward resistance is reduced, and the wind resistance coefficient of the whole automobile is reduced; on the other hand, the rear bottom guard board covers the rear of the whole vehicle bottom, and the aesthetic effect of the whole vehicle bottom is not greatly influenced from the view of the vehicle tail. In conclusion, the automobile rear bottom guard board capable of reducing the wind resistance coefficient provided by the application has the advantages of attractive appearance of the bottom of the whole automobile and wind resistance performance of the whole automobile.
Further, the front end connection part 21 includes:
A straight connection section 211, the straight connection section 211 extending in a second direction; the second direction is perpendicular to the first direction; a plurality of first connecting holes 212 are distributed on the straight connecting subsection 211 along the second direction; the first connection hole 212 is used for connecting with the rear subframe 32;
the two avoidance connection sections 213 are respectively arranged at two ends of the straight connection section 211; the end surface of the avoidance connection portion 213, which is far away from the protection region 1, is a concave curved surface that is curved towards the side close to the protection region 1; the concave curved surface encloses an avoidance space 214 for avoiding the rear wheel cover 33.
Referring to fig. 3 and 4, specifically, the front end connection portion 21 includes a straight connection portion 211 and two avoidance connection portions 213; the straight connection part 211 is positioned in the middle of the two avoidance connection parts 213; defining the horizontal direction in fig. 1 as a second direction, the second direction being perpendicular to the first direction; said straight connecting section 211 extends in said second direction; in this embodiment, four first connection holes 212 are uniformly distributed on the straight connection portion 211 along the second direction, and in other embodiments of the present application, other numbers of first connection holes 212 may be provided as required; the four first connecting holes 212 of the present embodiment are respectively connected to the rear subframe 32 through corresponding connecting frames 34; the connecting frame 34 is of an elongated columnar structure, one end of the connecting frame is connected with the rear auxiliary frame 32, and the other end of the connecting frame is connected with a rear bottom guard plate of the automobile; the connecting frame 34 is adopted to connect with the rear auxiliary frame 32 instead of directly connecting the rear bottom guard board of the automobile with the rear auxiliary frame 32 through the first connecting hole 212, so that the front end and the rear end of the covering plane of the rear bottom guard board of the automobile after installation form a height difference in the vertical direction, if the rear bottom guard board of the automobile is not obliquely installed, that is, the front end and the rear end of the covering plane of the rear bottom guard board of the automobile are consistent in the height in the vertical direction, the coating of the rear bottom area of the automobile is too tight, the heat dissipation of parts in the area is not facilitated, a flowing dead zone is easily formed in the space surrounded by the rear bottom guard board of the automobile and the bottom of the whole automobile, if wind enters the space, the wind-blocking phenomenon is easily generated, the wind resistance coefficient of the whole automobile is influenced, and the rear bottom guard board of the automobile is easily deformed or even damaged.
The two avoidance connection sections 213 are symmetrically arranged at the left side and the right side of the straight connection section 211, one side of the avoidance connection section 213 away from the protection area 1 is of a curved structure bent towards the side close to the protection area 1, the curved surface of the curved structure is a concave curved surface, the opening direction of the concave curved surface is away from the protection area 1, the orthographic projections of the two end parts of the concave curved surface in the first direction are not overlapped, and the position of the concave curved surface, which is close to the orthographic projection of one end of the straight connection section 211 in the first direction, is closer to the rear end connection section 22 than the orthographic projection of the one end, which is far away from the straight connection section 211, of the concave curved surface in the first direction; the concave curved surface of each avoidance connection portion 213 encloses an avoidance space 214, and the rear bottom guard board of the automobile in this embodiment forms two symmetrically arranged avoidance spaces 214; the two avoidance spaces 214 may respectively avoid the main body portions of the two rear wheel covers 33; in order to enhance the adhesion between the rear bottom guard plate of the automobile and the rear wheel cover 33, the concave curved surface has a bending tendency consistent with that of the outer wall of the main body of the rear wheel cover 33.
Further, an arc overlap edge 215 connected with the concave curved surface is arranged at one side of the avoiding space 214 away from the covering plane; the lap joint edge 215 is provided with a plurality of second connecting holes 216; the second connection hole 216 is for connection with the rear wheel cover 33.
Specifically, an arc overlap edge 215 is further disposed in the avoidance space 214; the overlapping edge 215 has a bending tendency that is consistent with the bending tendency of the concave curved surface; the overlapping edge 215 is located on the side remote from the cover plane, i.e. on the rear side of the installed rear floor panel; in this embodiment, three second connecting holes 216 are uniformly distributed on each overlapping edge 215, and in other embodiments of the present application, other numbers of second connecting holes 216 may be provided; the second connecting hole 216 is used for being fixedly connected with the rear wheel cover 33 so as to enhance the firmness of the installation of the rear bottom guard plate of the automobile; the specific installation mode can be as follows: a circle of connecting edges are arranged at corresponding positions on the outer wall of the main body part of the rear wheel cover 33, the shape and the size of the connecting edges are consistent with those of the lap joint edges, a corresponding number of through holes are formed in the connecting edges, and when the rear wheel cover is installed, the positions of the through holes correspond to the positions of the second connecting holes 216, and the rear wheel cover 33 and the main body part are connected through buckles or bolts.
Further, the end surface of the flat connection part 211, which is far away from the protection zone 1, is recessed toward the side close to the protection zone 1 to form a deformation preventing space 217.
By adopting the above technical solution, the two end portions of the two avoidance spaces 214, which are close to each other, are set to be non-flush, and the end portion of the front end connecting portion 21, which is relatively far from the side of the rear end connecting portion 22, is further close to the first connecting hole 212, so that the height difference formed in the vertical direction between the front end portion and the rear end portion of the covering plane of the rear bottom guard board of the mounted automobile is further reduced, and the windage coefficient of the whole automobile can be further reduced; meanwhile, if the end surface of the straight connection portion 211 is not recessed toward the side close to the protection area 1, the distance between the connection point of the rear floor of the automobile and the rear subframe 32 (i.e., the first connection hole 212) and the end surface of the straight connection portion 211 is larger, so that the portion of the rear floor guard board extending out of the automobile is easily deformed.
Further, the end surface of the rear end connecting portion 22 away from the protection area 1 is curved toward the side away from the protection area 1; the rear end connecting part 22 is provided with a plurality of third connecting holes 221; the third connection hole 221 is for connection with the rear bumper 31.
Specifically, the end surface of the rear end connection portion 22, which is relatively far from the side of the protection area 1, is a convex curved surface, which can be matched with the shape of the rear bumper 31 on one hand, so as to increase the aesthetic property of the bottom of the whole vehicle; on the other hand, the air flow flowing through the air guide device is beneficial to guiding the air flow, so that the windage coefficient of the whole car is reduced; in the present embodiment, seven third connection holes 221 are formed in the rear end connection portion 22, and in other embodiments of the present application, the number of third connection holes 221 may be different from that of the present application as required.
Further, the connection zone 2 further comprises two intermediate connection portions 23 distributed along the second direction; the two intermediate connection parts 23 are respectively connected between the front end connection part 21 and the rear end connection part 22; a first included angle is formed between the extending directions of the two middle connecting parts 23 away from the end face of one side of the protection area 1; the opening direction of the first angle is directed along the direction in which the rear end connecting portion 22 points to the front end connecting portion 21.
Specifically, the intermediate connection portion 23 is connected between the avoidance connection section 213 and the rear end connection portion 22; the end surfaces of the two middle connecting parts 23 far away from each other are straight end surfaces, and the extending directions of the two end surfaces can form a first included angle with the opening facing downwards in fig. 1; the angle range of the first included angle is 20-30 degrees, and in the embodiment, the angle of the first included angle is 25 degrees; by adopting the technical scheme, the air flow flowing through the position is favorably guided, so that the windage coefficient of the whole vehicle is favorably reduced; the middle connecting part 23 and the rear end connecting part 22 are in arc transition connection, so that the aesthetic property of the bottom of the whole vehicle is improved.
Further, a plurality of first reinforcing ribs 11 are arranged on the covering plane at intervals along the second direction; the first reinforcing ribs 11 extend in the first direction; the first reinforcing ribs 11 are provided with first water leakage holes 12.
Specifically, in order to increase the strength of the rear bottom guard board of the automobile and prevent the rear bottom guard board from deforming during transportation and running, a plurality of first reinforcing ribs 11 are arranged on the covering plane; in this embodiment, five first reinforcing ribs 11 are provided in total; the extending directions of the five first reinforcing ribs 11 are all the first directions, and the five first reinforcing ribs 11 are distributed at intervals along the second direction; a first water leakage hole 12 is formed in each first reinforcing rib 11; in this embodiment, each first reinforcing rib 11 is provided with two first water leakage holes 12; two of the first water leakage holes 12 are distributed along the first direction; by arranging the first water leakage holes 12, when the vehicle runs wading, the water accumulated in the automobile rear bottom area covered by the rear bottom guard plate can be timely discharged, and the damage or deformation of the automobile rear bottom guard plate is prevented.
Preferably, the lengths of the five first reinforcing ribs 11 are not identical, the lengths of the first reinforcing ribs 11 located at the middle position are longest, the lengths of the first reinforcing ribs 11 gradually decrease from the middle to the two sides, and the first reinforcing ribs located at the two sides of the middle position are symmetrically distributed by taking the first reinforcing ribs located at the middle position as symmetry axes; the end faces of the five first reinforcing ribs 11 close to the front end connecting part 21 are flush, and the connecting line of the center points of the end faces of the five first reinforcing ribs 11 close to the rear end connecting part 22 is on the first curved surface; the first curved surface is a convex curved surface which is curved towards one side of the rear end connecting part 22, and the bending trend of the convex curved surface is consistent with that of the curved structure of the rear end connecting part 22; by adopting the technical scheme, the strength of different areas on the guard plate body is balanced, and the deformation resistance of the guard plate body is enhanced.
Preferably, the first reinforcing rib 11 includes a stationary portion 111 and a gradual portion 112 provided on a side of the stationary portion 111 near the rear end connecting portion 22; the cross-sectional shape of the stationary portion 111 is rectangular; the cross-sectional shape of the gradual change portion 112 is an isosceles trapezoid, and its end connected to the stationary portion 111 is its large end.
Specifically, the first reinforcing rib 11 includes a stationary portion 111 and a gradual portion 112, the stationary portion 111 being relatively close to the front end connecting portion 21, the gradual portion 112 being relatively close to the rear end connecting portion 21; the large end of the gradual change part 111 is connected with the smooth part 111; through adopting above-mentioned technical scheme, on the one hand more be favorable to leading the air current to be favorable to reducing the windage coefficient of whole car, on the other hand can further increase the aesthetic property of whole car bottom.
Further, a second reinforcing rib 13 is connected between two adjacent first reinforcing ribs 11; the second reinforcing ribs 13 extend in the second direction. By providing the second reinforcing ribs 13, the strength of the automobile rear floor protecting plate can be further enhanced, and deformation of the automobile rear floor protecting plate during transportation and running can be prevented.
Further, the guard plate body is also provided with a second water leakage hole 14; the second water leakage hole 14 corresponds to a water outlet of the vehicle-mounted air conditioner. In this embodiment, the second water leakage hole 14 is disposed at a connection portion between the protection area 1 and the rear end connection portion 21, and corresponds to a water outlet of the vehicle air conditioner, for discharging water flowing out from the water outlet of the vehicle air conditioner.
In order to verify the good wind resistance performance of the automobile rear bottom guard plate capable of reducing the wind resistance coefficient, a model in the prior art is selected, and tests are carried out by adopting two modes of simulation verification and wind tunnel experiment verification, and test results show that the wind resistance coefficient of the automobile rear bottom guard plate capable of reducing the wind resistance coefficient is reduced by 9CTS compared with that of the traditional automobile rear bottom guard plate.
The automobile rear bottom guard board capable of reducing the wind resistance coefficient provided by the application has the advantages that the performance in various aspects of the whole automobile is improved, and the automobile rear bottom guard board specifically comprises:
(1) Wind resistance coefficient of the whole vehicle: experiments prove that compared with the traditional back bottom guard plate, the back bottom guard plate of the automobile has the advantages that the wind resistance coefficient of the whole automobile is reduced by 9CTS, and the wind resistance optimization effect is obvious;
(2) And (3) light weight: compared with the traditional automobile rear bottom guard plate, the weight of the automobile rear bottom guard plate is reduced by about 1Kg, and the light weight effect is obvious;
(3) Cost: compared with the traditional automobile rear bottom guard plate, the automobile rear bottom guard plate has smaller size, and saves the material cost and the die cost;
(4) Aesthetic properties: the rear end guard plate has certain aesthetic property when seen from the tail of the whole vehicle, and has great improvement on the aesthetic property compared with the rear end guard plate.
Example 2
The present embodiment provides a vehicle including the automobile rear floor panel capable of reducing the windage coefficient as described in embodiment 1.
In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", "side", and the like indicate orientations or positional relationships based on those shown in the drawings, or those conventionally put in use of the disclosed product, are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present disclosure, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this application, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the application, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present application.
Claims (10)
1. An automobile rear bottom guard board capable of reducing wind resistance coefficient is characterized by comprising a guard board body; the backplate body includes:
The protection area (1) is used for covering a rear bottom area of the automobile; a cover plane is arranged on one side of the protection area (1) away from the automobile rear bottom area; the automobile rear bottom area is positioned at the bottom of the whole automobile and is an area surrounded by a rear bumper (31), a rear auxiliary frame (32) and a pair of rear wheel covers (33);
The connecting area (2), the said connecting area (2) is set up around the said guard area (1), including front end connecting portion (21) and back end connecting portion (22) distributed along the first direction; the front end connecting part (21) is used for being connected with one side, close to the rear bumper (31), of the rear auxiliary frame (32); the rear end connecting part (22) is used for being connected with the rear bumper (31);
When the guard plate body is installed in the rear bottom area of the automobile, one end, close to the rear end connecting part (22), of the cover plane is higher than one end, close to the front end connecting part (21), of the cover plane, and the height difference of the cover plane and the front end connecting part in the vertical direction is smaller than or equal to a first preset threshold value; the value range of the first preset threshold value is 60-80mm.
2. The automobile rear bottom fender capable of reducing a wind resistance coefficient according to claim 1, wherein the front end connection portion (21) includes:
-a straight connection portion (211), the straight connection portion (211) extending in a second direction; the second direction is perpendicular to the first direction; a plurality of first connecting holes (212) are distributed on the straight connecting subsection (211) along the second direction; the first connecting hole (212) is used for being connected with the rear auxiliary frame (32);
The two avoidance connection parts (213) are respectively arranged at two ends of the straight connection part (211); the end face of the avoidance connection part (213) at the side far away from the protection area (1) is a concave curved surface which is bent towards the side close to the protection area (1); the concave curved surface encloses an avoidance space (214) for avoiding the rear wheel cover (33).
3. The automobile rear bottom guard plate capable of reducing the wind resistance coefficient according to claim 2, wherein an arc-shaped lap joint edge (215) connected with the concave curved surface is arranged on one side, away from the covering plane, of the avoidance space (214); a plurality of second connecting holes (216) are formed in the lap joint edge (215); the second connecting hole (216) is used for being connected with the rear wheel cover (33).
4. The automobile rear bottom guard plate capable of reducing wind resistance coefficient according to claim 2, wherein the end surface of the straight connecting part (211) on the side far away from the protection area (1) is sunken to form a deformation-preventing space (217) on the side close to the protection area (1).
5. The automobile rear bottom guard plate capable of reducing the wind resistance coefficient according to claim 2, wherein the end surface of the rear end connecting part (22) on the side far away from the protection area (1) is of a curved structure which is curved towards the side far away from the protection area (1); the rear end connecting part (22) is provided with a plurality of third connecting holes (221); the third connection hole (221) is used for being connected with the rear bumper (31).
6. The vehicle tailgate with reduced windage according to claim 2, characterized in that the connection zone (2) further comprises two intermediate connections (23) distributed along the second direction; two intermediate connecting parts (23) are respectively connected between the front end connecting part (21) and the rear end connecting part (22); a first included angle is formed between the extending directions of the two middle connecting parts (23) away from the end face of one side of the protection area (1); the opening direction of the first included angle is oriented along the direction that the rear end connecting part (22) points to the front end connecting part (21).
7. The automobile rear bottom guard plate capable of reducing wind resistance coefficient according to any one of claims 3-6, wherein a plurality of first reinforcing ribs (11) are arranged on the covering plane at intervals along the second direction; the first reinforcing rib (11) extends along the first direction; the first reinforcing ribs (11) are provided with first water leakage holes (12).
8. The automobile rear bottom fender capable of reducing a windage coefficient according to claim 7, wherein the first stiffener (11) includes a stationary portion (111) and a gradual portion (112) provided on a side of the stationary portion (111) near the rear end connecting portion (22); the cross-sectional shape of the stationary part (111) is rectangular; the cross-sectional shape of the gradual change portion (112) is an isosceles trapezoid, and the end thereof connected with the stationary portion (111) is the large end thereof.
9. The automobile rear bottom guard plate capable of reducing the wind resistance coefficient according to claim 8, wherein a second reinforcing rib (13) is connected between two adjacent first reinforcing ribs (11); the second reinforcing rib (13) extends in the second direction.
10. A vehicle comprising a vehicle rear floor panel according to any one of claims 1 to 9, wherein the wind resistance coefficient is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310082591.0A CN115923683B (en) | 2023-01-31 | 2023-01-31 | Automobile rear bottom guard board capable of reducing wind resistance coefficient and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310082591.0A CN115923683B (en) | 2023-01-31 | 2023-01-31 | Automobile rear bottom guard board capable of reducing wind resistance coefficient and automobile |
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| Publication Number | Publication Date |
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| CN115923683A CN115923683A (en) | 2023-04-07 |
| CN115923683B true CN115923683B (en) | 2024-05-10 |
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| CN202310082591.0A Active CN115923683B (en) | 2023-01-31 | 2023-01-31 | Automobile rear bottom guard board capable of reducing wind resistance coefficient and automobile |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435298B1 (en) * | 1998-12-22 | 2002-08-20 | Nissan Motor Co., Ltd. | Vehicle rear underside structure |
| CN101815643A (en) * | 2007-10-03 | 2010-08-25 | 丰田自动车株式会社 | Vehicle and vehicle substructure |
| CN102822041A (en) * | 2010-04-08 | 2012-12-12 | 日产自动车株式会社 | Vehicle underfloor structure |
| DE102014206203A1 (en) * | 2014-04-01 | 2015-10-01 | Volkswagen Aktiengesellschaft | Arrangement for increasing the rigidity of the body of a motor vehicle and motor vehicle with such an arrangement |
| CN207931821U (en) * | 2018-03-01 | 2018-10-02 | 贵安新区新特电动汽车工业有限公司 | Reduce the structure and electric vehicle of vehicle windage |
| CN110831841A (en) * | 2017-06-29 | 2020-02-21 | 本田技研工业株式会社 | Vehicle body rear structure |
| CN111976851A (en) * | 2019-05-22 | 2020-11-24 | 丰田自动车株式会社 | Vehicle rear structure |
| CN212473329U (en) * | 2020-05-13 | 2021-02-05 | 广州汽车集团股份有限公司 | Backplate structure and car at bottom of back |
| CN112937698A (en) * | 2021-03-24 | 2021-06-11 | 重庆长安汽车股份有限公司 | Front section assembly of automobile rear floor |
| WO2021259445A1 (en) * | 2020-06-22 | 2021-12-30 | Atlas Technologies Holding B.V. | Vehicle with bottom structure for reducing aerodynamic resistance |
| KR20220093750A (en) * | 2020-12-28 | 2022-07-05 | 현대자동차주식회사 | Rear structure for vehicle |
| CN115214780A (en) * | 2022-03-31 | 2022-10-21 | 长城汽车股份有限公司 | Vehicle body rear structure and vehicle |
| CN217753918U (en) * | 2022-08-11 | 2022-11-08 | 北京汽车研究总院有限公司 | Spare wheel basin backplate, vehicle of vehicle |
-
2023
- 2023-01-31 CN CN202310082591.0A patent/CN115923683B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435298B1 (en) * | 1998-12-22 | 2002-08-20 | Nissan Motor Co., Ltd. | Vehicle rear underside structure |
| CN101815643A (en) * | 2007-10-03 | 2010-08-25 | 丰田自动车株式会社 | Vehicle and vehicle substructure |
| CN102822041A (en) * | 2010-04-08 | 2012-12-12 | 日产自动车株式会社 | Vehicle underfloor structure |
| DE102014206203A1 (en) * | 2014-04-01 | 2015-10-01 | Volkswagen Aktiengesellschaft | Arrangement for increasing the rigidity of the body of a motor vehicle and motor vehicle with such an arrangement |
| CN110831841A (en) * | 2017-06-29 | 2020-02-21 | 本田技研工业株式会社 | Vehicle body rear structure |
| CN207931821U (en) * | 2018-03-01 | 2018-10-02 | 贵安新区新特电动汽车工业有限公司 | Reduce the structure and electric vehicle of vehicle windage |
| CN111976851A (en) * | 2019-05-22 | 2020-11-24 | 丰田自动车株式会社 | Vehicle rear structure |
| CN212473329U (en) * | 2020-05-13 | 2021-02-05 | 广州汽车集团股份有限公司 | Backplate structure and car at bottom of back |
| WO2021259445A1 (en) * | 2020-06-22 | 2021-12-30 | Atlas Technologies Holding B.V. | Vehicle with bottom structure for reducing aerodynamic resistance |
| KR20220093750A (en) * | 2020-12-28 | 2022-07-05 | 현대자동차주식회사 | Rear structure for vehicle |
| CN112937698A (en) * | 2021-03-24 | 2021-06-11 | 重庆长安汽车股份有限公司 | Front section assembly of automobile rear floor |
| CN115214780A (en) * | 2022-03-31 | 2022-10-21 | 长城汽车股份有限公司 | Vehicle body rear structure and vehicle |
| CN217753918U (en) * | 2022-08-11 | 2022-11-08 | 北京汽车研究总院有限公司 | Spare wheel basin backplate, vehicle of vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 基于多款车型为基准的汽车保险杠系统设计;冯光;;北京汽车;20170625(03);全文 * |
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| CN115923683A (en) | 2023-04-07 |
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